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Policy Impact: Impaired Driving

How State Ignition Interlock Laws Measure Up

As of February 2011, more than half of all states require some DWI offenders to install ignition interlocks, but only 13 states require interlocks for all convicted offenders, even on a first conviction.1

Map of the United States

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State Ignition Interlocks Mandatory for All Offenders Ignition Interlocks Mandatory for Repeat Offenders AND high BAC offenders Ignition Interlocks Mandatory for repeat offenders OR high BAC offenders No Mandatory Ignition Interlock Laws
Alabama       X
Alaska X      
Arizona X      
Arkansas X      
California       X (4-county pilot program for first offenders)
Colorado X      
Connecticut       X
Delaware     X (repeat offenders only)  
District of Columbia        
Florida   X    
Georgia     X (repeat offenders only)  
Hawaii X      
Idaho       X
Illinois X      
Indiana       X
Iowa       X
Kansas   X    
Kentucky       X
Louisiana X      
Maine       X
Maryland       X
Massachusetts     X (repeat offenders only)  
Michigan       X
Minnesota       X
Mississippi       X
Missouri     X (repeat offenders only)  
Montana     X (repeat offenders only)  
Nebraska X      
Nevada       X
New Hampshire   X    
New Jersey   X    
New Mexico X      
New York X      
North Carolina   X    
North Dakota       X
Ohio       X
Oklahoma     X (repeat offenders only)  
Oregon X      
Pennsylvania     X (repeat offenders only)  
Rhode Island       X
South Carolina     X (repeat offenders only)  
South Dakota       X
Tennessee     X (high BAC offenders only)  
Texas   X    
Utah X      
Vermont       X
Virginia   X    
Washington X      
West Virginia   X    
Wisconsin   X    
Wyoming   X    

Back to Policy Impact: Alcohol Impaired Driving

References

  1. CDC consulted the following sources to develop the “How state ignition interlock laws measure up” map:

    - Insurance Institute for Highway Safety. DUI/DWI Laws. [cited 2010 Dec 20] Available at URL: http://www.iihs.org/laws/dui.aspx.

    - MADD. Status of state ignition interlock laws. [cited 2010 Dec 20] Available at URL: http://www.madd.org/drunk-driving/campaign/status-of-state-ignition.html.

    - National Conference of State Legislatures. State ignition interlock laws. [cited 2010 Dec 20] Available at URL: http://www.ncsl.org/default.aspx?tabid=13558.

Policy Impact is a series of issue briefs from CDC’s Injury Center highlighting key public health issues and important, science-based policy actions that can be taken to address them.

 
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